transformerimpl.java

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		    _tohFactory.setOutputStream(connection.getOutputStream());
		    return _tohFactory.getSerializationHandler();
                }
                else {
                    // system id is just a filename
                    url = new File(systemId).toURL();
		    _tohFactory.setOutputStream(
		        new FileOutputStream(url.getFile()));
		    return _tohFactory.getSerializationHandler();
                }
	    }
	}
        // If we cannot write to the location specified by the SystemId
        catch (UnknownServiceException e) {
            throw new TransformerException(e);
        }
        catch (ParserConfigurationException e) {
            throw new TransformerException(e);
        }
        // If we cannot create the file specified by the SystemId
        catch (IOException e) {
            throw new TransformerException(e);
        }
	return null;
    }

    /**
     * Set the internal DOM that will be used for the next transformation
     */
    protected void setDOM(DOM dom) {
	_dom = dom;
    }

    /**
     * Builds an internal DOM from a TrAX Source object
     */
    private DOM getDOM(Source source) throws TransformerException {
        try {
            DOM dom = null;

            if (source != null) {
                DTMWSFilter wsfilter;
                if (_translet != null && _translet instanceof StripFilter) {
                    wsfilter = new DOMWSFilter(_translet);
                 } else {
                    wsfilter = null;
                 }
            
                 boolean hasIdCall = (_translet != null) ? _translet.hasIdCall()
                                                         : false;

                 if (_dtmManager == null) {
                     _dtmManager =
                         (XSLTCDTMManager)_tfactory.getDTMManagerClass()
                                                   .newInstance();
                 }
                 dom = (DOM)_dtmManager.getDTM(source, false, wsfilter, true,
                                              false, false, 0, hasIdCall);
            } else if (_dom != null) {
                 dom = _dom;
                 _dom = null;  // use only once, so reset to 'null'
            } else {
                 return null;
            }

            if (!_isIdentity) {
                // Give the translet the opportunity to make a prepass of
                // the document, in case it can extract useful information early
                _translet.prepassDocument(dom);
            }

            return dom;

        }
        catch (Exception e) {
            if (_errorListener != null) {
                postErrorToListener(e.getMessage());
            }
            throw new TransformerException(e);
        }
    }
 
    /**
     * Returns the {@link com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl}
     * object that create this <code>Transformer</code>.
     */
    protected TransformerFactoryImpl getTransformerFactory() {
        return _tfactory;
    }

    /**
     * Returns the {@link com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory}
     * object that create the <code>TransletOutputHandler</code>.
     */
    protected TransletOutputHandlerFactory getTransletOutputHandlerFactory() {
        return _tohFactory;
    }

    private void transformIdentity(Source source, SerializationHandler handler)
	throws Exception 
    {
        // Get systemId from source
        if (source != null) {
            _sourceSystemId = source.getSystemId();
        }

        if (source instanceof StreamSource) {
            final StreamSource stream = (StreamSource) source;
            final InputStream streamInput = stream.getInputStream();
            final Reader streamReader = stream.getReader();
            final XMLReader reader = _readerManager.getXMLReader();

            try {
                // Hook up reader and output handler 
                try {
                    reader.setProperty(LEXICAL_HANDLER_PROPERTY, handler);
		    reader.setFeature(NAMESPACE_PREFIXES_FEATURE, true);
                }
                catch (SAXException e) {
                    // Falls through
                }
                reader.setContentHandler(handler);

                // Create input source from source
                InputSource input;
                if (streamInput != null) {
                    input = new InputSource(streamInput);
                    input.setSystemId(_sourceSystemId); 
                } 
                else if (streamReader != null) {
                    input = new InputSource(streamReader);
                    input.setSystemId(_sourceSystemId); 
                } 
                else if (_sourceSystemId != null) {
                    input = new InputSource(_sourceSystemId);
                } 
                else {
                    ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_SOURCE_ERR);
                    throw new TransformerException(err.toString());
                }

                // Start pushing SAX events
                reader.parse(input);
            } finally {
                _readerManager.releaseXMLReader(reader);
            }
        } else if (source instanceof SAXSource) {
            final SAXSource sax = (SAXSource) source;
            XMLReader reader = sax.getXMLReader();
            final InputSource input = sax.getInputSource();
            boolean userReader = true;

            try {
                // Create a reader if not set by user
                if (reader == null) {
                    reader = _readerManager.getXMLReader();
                    userReader = false;
                }

                // Hook up reader and output handler 
                try {
                    reader.setProperty(LEXICAL_HANDLER_PROPERTY, handler);
		    reader.setFeature(NAMESPACE_PREFIXES_FEATURE, true);
                }
                catch (SAXException e) {
                    // Falls through
                }
                reader.setContentHandler(handler);

                // Start pushing SAX events
                reader.parse(input);
            } finally {
                if (!userReader) {
                    _readerManager.releaseXMLReader(reader);
                }
            }
        } else if (source instanceof DOMSource) {
            final DOMSource domsrc = (DOMSource) source;
            new DOM2TO(domsrc.getNode(), handler).parse();
        } else if (source instanceof XSLTCSource) {
            final DOM dom = ((XSLTCSource) source).getDOM(null, _translet);
            ((SAXImpl)dom).copy(handler);
        } else {
            ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_NO_SOURCE_ERR);
            throw new TransformerException(err.toString());
        }
    }

    /**
     * Internal transformation method - uses the internal APIs of XSLTC
     */
    private void transform(Source source, SerializationHandler handler, 
	String encoding) throws TransformerException 
    {
	try {
            /*
             * According to JAXP1.2, new SAXSource()/StreamSource()
             * should create an empty input tree, with a default root node. 
             * new DOMSource()creates an empty document using DocumentBuilder.
             * newDocument(); Use DocumentBuilder.newDocument() for all 3 
             * situations, since there is no clear spec. how to create 
             * an empty tree when both SAXSource() and StreamSource() are used.
             */
            if ((source instanceof StreamSource && source.getSystemId()==null 
                && ((StreamSource)source).getInputStream()==null &&
                ((StreamSource)source).getReader()==null)||
                (source instanceof SAXSource &&
                ((SAXSource)source).getInputSource()==null &&
                ((SAXSource)source).getXMLReader()==null )||
                (source instanceof DOMSource && 
                ((DOMSource)source).getNode()==null)){
                        DocumentBuilderFactory builderF = 
                                DocumentBuilderFactory.newInstance();
                        DocumentBuilder builder = 
                                builderF.newDocumentBuilder();
                        String systemID = source.getSystemId();
                        source = new DOMSource(builder.newDocument());

                        // Copy system ID from original, empty Source to new
                        if (systemID != null) {
                          source.setSystemId(systemID);
                        }
            }           
	    if (_isIdentity) {
		transformIdentity(source, handler);
	    } else {
		_translet.transform(getDOM(source), handler);
	    }
	} catch (TransletException e) {
	    if (_errorListener != null)	postErrorToListener(e.getMessage());
	    throw new TransformerException(e);
	} catch (RuntimeException e) {
	    if (_errorListener != null)	postErrorToListener(e.getMessage());
	    throw new TransformerException(e);
	} catch (Exception e) {
	    if (_errorListener != null)	postErrorToListener(e.getMessage());
	    throw new TransformerException(e);
	} finally {
            _dtmManager = null;
        }
    }

    /**
     * Implements JAXP's Transformer.getErrorListener()
     * Get the error event handler in effect for the transformation.
     *
     * @return The error event handler currently in effect
     */
    public ErrorListener getErrorListener() {  
	return _errorListener; 
    }

    /**
     * Implements JAXP's Transformer.setErrorListener()
     * Set the error event listener in effect for the transformation.
     * Register a message handler in the translet in order to forward
     * xsl:messages to error listener.
     *
     * @param listener The error event listener to use
     * @throws IllegalArgumentException
     */
    public void setErrorListener(ErrorListener listener)
	throws IllegalArgumentException {
        if (listener == null) {
	    ErrorMsg err = new ErrorMsg(ErrorMsg.ERROR_LISTENER_NULL_ERR,
					"Transformer");
            throw new IllegalArgumentException(err.toString());
	}
        _errorListener = listener;
        
	// Register a message handler to report xsl:messages
    if (_translet != null)
    	_translet.setMessageHandler(new MessageHandler(_errorListener));
    }

    /**
     * Inform TrAX error listener of an error
     */
    private void postErrorToListener(String message) {
        try {
            _errorListener.error(new TransformerException(message));
	}
	catch (TransformerException e) {
            // ignored - transformation cannot be continued
        }
    }

    /**
     * Inform TrAX error listener of a warning
     */
    private void postWarningToListener(String message) {
        try {
            _errorListener.warning(new TransformerException(message));
        }
	catch (TransformerException e) {
            // ignored - transformation cannot be continued
        }
    }

    /**
     * The translet stores all CDATA sections set in the <xsl:output> element
     * in a Hashtable. This method will re-construct the whitespace separated
     * list of elements given in the <xsl:output> element.
     */
    private String makeCDATAString(Hashtable cdata) {
	// Return a 'null' string if no CDATA section elements were specified
	if (cdata == null) return null;

	StringBuffer result = new StringBuffer();

	// Get an enumeration of all the elements in the hashtable
	Enumeration elements = cdata.keys();
	if (elements.hasMoreElements()) {
	    result.append((String)elements.nextElement());
	    while (elements.hasMoreElements()) {
		String element = (String)elements.nextElement();
		result.append(' ');
		result.append(element);
	    }
	}
	
	return(result.toString());
    }

    /**
     * Implements JAXP's Transformer.getOutputProperties().
     * Returns a copy of the output properties for the transformation. This is
     * a set of layered properties. The first layer contains properties set by
     * calls to setOutputProperty() and setOutputProperties() on this class,
     * and the output settings defined in the stylesheet's <xsl:output>
     * element makes up the second level, while the default XSLT output
     * settings are returned on the third level.
     *
     * @return Properties in effect for this Transformer
     */
    public Properties getOutputProperties() { 
	return (Properties) _properties.clone();
    }

    /**
     * Implements JAXP's Transformer.getOutputProperty().
     * Get an output property that is in effect for the transformation. The
     * property specified may be a property that was set with setOutputProperty,
     * or it may be a property specified in the stylesheet.
     *
     * @param name A non-null string that contains the name of the property
     * @throws IllegalArgumentException if the property name is not known
     */
    public String getOutputProperty(String name)
	throws IllegalArgumentException 
    {
	if (!validOutputProperty(name)) {
	    ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
	    throw new IllegalArgumentException(err.toString());
	}
	return _properties.getProperty(name);
    }

    /**
     * Implements JAXP's Transformer.setOutputProperties().
     * Set the output properties for the transformation. These properties
     * will override properties set in the Templates with xsl:output.
     * Unrecognised properties will be quitely ignored.
     *
     * @param properties The properties to use for the Transformer
     * @throws IllegalArgumentException Never, errors are ignored
     */
    public void setOutputProperties(Properties properties) 
	throws IllegalArgumentException 
    {
	if (properties != null) {
	    final Enumeration names = properties.propertyNames();

	    while (names.hasMoreElements()) {
		final String name = (String) names.nextElement();

		// Ignore lower layer properties
		if (isDefaultProperty(name, properties)) continue;

		if (validOutputProperty(name)) {
		    _properties.setProperty(name, properties.getProperty(name));
		}
		else {
		    ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
		    throw new IllegalArgumentException(err.toString());
		}
	    }
	}
	else {
	    _properties = _propertiesClone;
	}
    }

    /**
     * Implements JAXP's Transformer.setOutputProperty().
     * Get an output property that is in effect for the transformation. The
     * property specified may be a property that was set with 
     * setOutputProperty(), or it may be a property specified in the stylesheet.
     *
     * @param name The name of the property to set
     * @param value The value to assign to the property
     * @throws IllegalArgumentException Never, errors are ignored
     */
    public void setOutputProperty(String name, String value)
	throws IllegalArgumentException 
    {
	if (!validOutputProperty(name)) {
	    ErrorMsg err = new ErrorMsg(ErrorMsg.JAXP_UNKNOWN_PROP_ERR, name);
	    throw new IllegalArgumentException(err.toString());
	}
	_properties.setProperty(name, value);
    }

    /**
     * Internal method to pass any properties to the translet prior to
     * initiating the transformation
     */
    private void transferOutputProperties(AbstractTranslet translet)
    {
	// Return right now if no properties are set
	if (_properties == null) return;

	// Get a list of all the defined properties
	Enumeration names = _properties.propertyNames();
	while (names.hasMoreElements()) {
	    // Note the use of get() instead of getProperty()
	    String name  = (String) names.nextElement();
	    String value = (String) _properties.get(name);

	    // Ignore default properties
	    if (value == null) continue;

	    // Pass property value to translet - override previous setting
	    if (name.equals(OutputKeys.ENCODING)) {
		translet._encoding = value;
	    }